Test262 results representation

[Razican]

This PR adds a visual representation to the ECMAScript test suite results, it closes #719.

I also added "Prettier" formatting for all the custom files in the gh-pages branch.

[Razican]

A small peek on how this is looking:

Screenshot

Things I consider we should add:

• version history on the right column (for now, only v0.10, but should add new ones automatically)
• Graph to show the progress of the master branch.
• Loading spinning icons for when it's taking some time to load (full result files are huge).
• Add links to information about test262 test suite and how to interpret the results.

Things already present:

• Latest version and master branch overview
• Fine-grained view of the working/failing tests
• Click on a given test to directly go to the test262 repo, to the actual test file source
• Formatted the code to use Prettier format.
• Automatic updates on every commit to master and after every release.
• Progress bar for a visual representation on conformance.
• passed/failed/ignored/panic information on test results.
• Links to test262 sources in the specific commit.
• Name of the test on hover.
• Links to benchmarks and conformance results from the demo.

[Razican]

I think this is ready for review. Some extra things can be added such as a graph for the master branch, but I think this is already pretty useful in the current form. I will open a couple of issues to:

• Add a popover graph showing the progress of the master branch
• Add the version history in the rightmost column
• Rethink the gh-pages to not embed external libraries.

[HalidOdat]

Looks good to me! :)

Maybe we should add the link in README.md, for easier access